Newman/celegansneural
Neural network of the nematode C. Elegans
Name 
celegansneural 
Group 
Newman 
Matrix ID 
2392 
Num Rows

297 
Num Cols

297 
Nonzeros

2,345 
Pattern Entries

2,345 
Kind

Directed Weighted Graph 
Symmetric

No 
Date

1998 
Author

J. White, E. Southgate, J. Thompson, S. Brenner 
Editor

D. Watts, S. Strogatz 
Structural Rank 

Structural Rank Full 

Num Dmperm Blocks


Strongly Connect Components

57 
Num Explicit Zeros

0 
Pattern Symmetry

16.8% 
Numeric Symmetry

4.9% 
Cholesky Candidate

no 
Positive Definite

no 
Type

integer 
SVD Statistics 
Matrix Norm 
1.838757e+02 
Minimum Singular Value 
0 
Condition Number 
Inf

Rank 
248 
sprank(A)rank(A) 

Null Space Dimension 
49 
Full Numerical Rank? 
no 
Download Singular Values 
MATLAB

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Notes 
Network collection from M. Newman
http://wwwpersonal.umich.edu/~mejn/netdata/
Neural network of the nematode C. Elegans
Compiled by Duncan Watts and Steven Strogatz from original experimental
data by White et al.
The graph celegansneural describes a weighted, directed network
representing the neural network of C. Elegans. The data were taken from
the web site of Prof. Duncan Watts at Columbia University,
http://cdg.columbia.edu/cdg/datasets. The nodes in the original data were
not consecutively numbered, so they have been renumbered to be consecutive.
The original node numbers from Watts' data file are retained as the labels
of the nodes. Edge weights are the weights given by Watts.
These data can be cited as:
J. G. White, E. Southgate, J. N. Thompson, and S. Brenner, "The structure
of the nervous system of the nematode C. Elegans", Phil. Trans. R. Soc.
London 314, 1340 (1986).
D. J. Watts and S. H. Strogatz, "Collective dynamics of `smallworld
networks", Nature 393, 440442 (1998).
